Riveting-machine.



J. N. CAYO. RIVETING MACHINE. APPLICATION FILED APR. 3, 1917.

Patented July 2, 1918.

' INVENTOR WITNESSES J1 Gaga.

A'r'rohNEY To all whom it'may concern:

ED STATES PATENT oFmoE.

JULIUS N. CAYO, OF GARY, INDIANA, ASSIGNOBL TO THE RED-DEVIL-SPEED HAMMER COMPANY, OF GARY, INDIANA,

A CORPORATION OF INDIANA.

' Be it known that I, JULIUS zen of the United States, residing at-Gary, in the county of Lake and State of Indiana, have invented new and useful Improvements in Riveti ng-Machines, of which the following is a specification.

' This invention relates. to metalf;forging-,land more especially to powerQhammers which are hand-operated; and thef'object ofthe same is to produce a riveting machine wherein the hammer is caused to deliver rapid strokes to 'work overlying. theanvil and the force of the blows may be instantaneously adjusted,or the hammer-can be thrown out of action without stopping' 'the rotation of the power wheel which carries the cams.

These and other objects are carried out by the described and claimed, and as shown in the drawings wherein:

Figure 1 is a side elevation of this machine complete.

2 is a detail of the face of the hammer.

A suitable table 1 is mounted on legs or standards 2 and supports bearings 3 in which at 4 is journaled the shaft of'a wheel 5 which in the present instance is rotated constantly by a belt 6 leading downward from a source of power overhead and not necessary to illustrate. This may be called the cam-wheel, and it is provided with a series of pins 7 in its side face which constitute the cams. The anvil 9 is indicated as supported at the front end of the table.

Another standard at about the midlength of the table, constitutes a fulcrum 10 for the hammer 11 whose forward end'carries I the hammer head 12 which coacts with and of faces,

strikes upon the face of the anvil 9. As seen in Fig. 2 this head may have a plurality and the anvil will be wide enough to accommodate all of themor may itself have a plurality of faces. I intendto use this machine for riveting, in 'which' case these faces are shaped accordingly; but I do not wish to be limited in this respect as the machine may be used for any purpose to which it is adapted. The forward arm of the hammer is' rather longer than its rearward arm, and a tension spring 13 of considerable strength leads downward therefrom, through a'hole or aperture 14 in the Specification of Letters Bat'ent. a ucatima ean m a; 1917. Serial No. 159,575

. table, N. CAYo, a citi- 1 moved from" the preferably thereto'by screws or bolts 21' and provide mechanism hereinafter more fully.

and' the strength it will overcome the weight of the front arm it passes head delivers a blow onto Patented July'2, 191s.

and. is connected at 15' with a treadle 1 6 which is pivotedv at 17 at its rear end to one of the rear legs and has a foot piece 18 st anding within reach of the operator at the front ofthe machine. When now pressure is placed on the foot piece, the treadle puts tenslon on the-slri ng 13, andcthe latter rontarm. of the hamnaturall'y draws the p v when.-."pressure is re-- merg-do nw oot the hammer sustains the weight of the spring and the weight of the treadle.

The rear and shorter arm of the hammer has a wear plate 20- attached witha tongue 22 at its rear end projecting alongside the wheel 5 and within the path of the pins 7, and therefore when the wheel rotates-in the direction of the arrow these pins successively strike the tongue and epress the wear plate and the rear arm of the hammer A .suitable stop 23 prevents its excessive depression. The numeral 2 1 designates a relief spring connectin the rear arm of the hammer with the tab e 1 at a suitable point in the rear of the fulcrum 10, of this spring is such that and the forward spring 13 and treadle 16. It follows, therefore, that when the operator removes his foot from the foot piece 18 the front arm of the hammer rises ifild the rear arm descends and the wear plate moves out of the cam wheel so that the latter rotates idly. thereafter and the hammer delivers no blows. ator depresses the treadle he overcomes the force .of the release spring and the rotation of the cam wheel forces the pins to engage the wear plate as. will be clear. Each pin bears down on this plate and tilts the front end of the hammer upward, and then when off the plate the tension spring causes the front arm of the hammer and its head to descend, and the face of the the anvil oron the work laid thereupon. The force of this blow is regulated by the tension applied to the spring 13, and this tension 15 imme ately adjustable by the operator who has it under the control of his foot. I have successfully used this machine-to deliver as high as sixteen hundred blows a minute, but it can piece the front arm of path of the pins on the be run more rapidly or more 1 slowly with equal success.

' could be employed.

tial that the h faces, although can he done with with one having While I have shown the to the wheel 5 by means of a belt, I do not wish to be limited in this respect. The parts are of the desired sizes, proportions, [and act springs shown'and described herein ex cept as required by the claim, as it is obvious that their mechanical equivalents What I claim as new is In a riveting machine, the combinationwith a table mounted on legs and having bearings at its rear end, an anvil atits front end, and a fulcruin between these elements,

a power-driven wheel mounted in said hearings and having pins projecting from it, and a treadle pivoted toone of the rear legs and underlying the table-top; of a hammer pivoted near-its rear end a head at its front extremity overlying said anvil, a spring connecting its front'portion adjacent said head and the forward portion 0' said treadle, an unstanding stop in the the front end of the hammer and its head and said treadle and its spring when the latter is not under tension, for the purpose set forth.

In testimony whereof I aflix my s1 ature.

JULIUs N. ,AYO. I 

